<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/goods/add' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-alert
        title="添加商品信息"
        type="warning"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤线  activeIndex - 0 让（字符串类型）变成（数值类型）-->
      <el-steps :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tabs栏 -->

      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        class="demo-ruleForm"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClick"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>

            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>

            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>

            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>

            <el-form-item label="商品类别" prop="goods_cat">
              <el-cascader
                expand-trigger="hover"
                :options="catelist"
                :props="cateProps"
                v-model="addForm.goods_cat"
                @change="handleChange"
              >
              </el-cascader
            ></el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip"></div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本 -->
            <quill-editor v-model="addForm.goods_introduce"> </quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="success" class="btnAdd" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 预览图片框 -->
    <el-dialog title="图片浏览" :visible.sync="PicDialogVisible" width="50%">
      <img :src="PicUrl" alt="" class="PicImg" />
    </el-dialog>
  </div>
</template>

<script>
//深拷贝要用到
import _ from "lodash";
export default {
  data() {
    return {
      activeIndex: "0",
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属的分类数组(级联要用到)
        goods_cat: [],
        //pics要数组形式
        pics: [],
        //富文本
        goods_introduce: "",
        //attr数组中要什么看文档
        attrs: [],
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入对应内容", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入对应内容", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入对应内容", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入对应内容", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请输入对应内容", trigger: "blur" },
        ],
      },
      //商品类别列表（级联）要用
      catelist: [],
      //级联要的参数
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      manyTableData: [], //动态参数
      onlyTableData: [], //静态参数
      //图片提交到的后台
      uploadUrl: "http://127.0.0.1:8888/api/private/v1/upload",
      //图片上传组件的headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem("token"),
      },
      PicUrl: "",
      PicDialogVisible: false,
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    //获取商品类别列表 在级联中要用到
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        this.$message.error("获取数据失败");
      }
      this.catelist = res.data;

      // console.log(this.catelist);
    },
    //级联选择时触发这个函数
    handleChange() {
      console.log(this.addForm.goods_cat);
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    //事件阻止，没完成条件，不能跳到另一个tab
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },
    //tab栏点击切换时
    async tabClick() {
      if (this.activeIndex === "1") {
        //获取动态参数
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败");
        }
        console.log(res.data);
        //用for循环将字符串转为数组（每个数组中的动态参数）
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTableData = res.data;
      } else if (this.activeIndex === "2") {
        //获取静态参数
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态参数列表失败");
        }
        this.onlyTableData = res.data;
        console.log(this.onlyTableData);
      }
    },
    //预览图片方法
    handlePreview(file) {
      console.log(file);
      this.PicUrl = file.response.data.url;
      this.PicDialogVisible = true;
    },
    //那到上传成功之后的临时路径才行（form的一项提交内容）
    handleSuccess(response) {
      console.log(response);
      //拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path };
      //2.将图片信息对象，push到pics数组中
      this.addForm.pics.push(picInfo);
      console.log(this.addForm);
    },
    //删除图片方法
    handleRemove(file) {
      const filePath = file.response.data.tmp_path;
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath);
      this.addForm.pics.splice(i, 1);
      console.log(this.addForm);
    },
    //添加商品
    add() {
      // console.log(this.addForm);
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项");
        }
        //执行添加业务逻辑
        // lodash cloneDeep(obj) 深拷贝 级联要数组 这边要字符串
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(",");
        // console.log(form);
        //处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" "),
          };
        });
        //处理静态参数
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          };
          this.addForm.attrs.push(newInfo);
        });
        console.log(form);

        //发起请求添加商品
        //商品的名称，必须是唯一的
        const { data: res } = await this.$http.post("goods", form);
        if (res.meta.status !== 201) {
          return this.$message.error("添加商品失败！");
        }
        this.$message.success("添加商品成功！");
        this.$router.push("/goods");
      });
    },
  },
  computed: {
    //三级级联的id
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>

<style lang="less" scoped>
.PicImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>